Luke Skywalker, and Princess Leah, from Star Wars. Natalie Portman played the part of Queen (and later Senator) Amidallah (horribly misspelled) in the most recent Star Wars (Episodes 1-3), which tell the story of Darth Vader’s rise to power, as well as revealing the ID of the Emperor who drew Vader to the dark side.
Portman’s character died while giving birth to Luke Skywalker, and his sister, Leah.
I can understand why her character died in the movie; it doesn’t looke like Miss Portman has eaten in several years.